i jsut got a rc18t factory kit... it all put together and i need some help picking some stuff out

first

-i wanna run some type of mamba brushless... whats best 8000, 6800......

-battery and charger..... i'm thinknig lipos, and what type of charger works good?

-servos.... jsut any regular servo works???

-as for receiver and controller i allready got it covered